Final answer:
Groupthink can be prevented using the Devil's advocacy technique, which involves appointing a member to challenge the majority viewpoint and present alternative perspectives.
Step-by-step explanation:
Groupthink is a decision-making error found among teams that can be prevented using the Devil's advocacy technique. Groupthink occurs when group members modify their opinions to align with what they believe is the group consensus. To avoid groupthink, it is important to encourage dissenting opinions and critical thinking by appointing a devil's advocate. Devil's advocacy involves assigning one or more group members to challenge the majority viewpoint and present alternative perspectives.